Nanofiltration of textile industry wastewater using a physicochemical process as a pre-treatment

Bes-Piá, A.; Iborra–Clar, M.I.; Iborra-Clar, A.; Mendoza–Roca, J.A.; Cuartas-Uribe, B.; Alcaina–Miranda, M.I.

doi:10.1016/j.desal.2004.11.044

Cited by 58 publications

(22 citation statements)

References 8 publications

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“…In general, conventional biological treatment provides good COD removal, but low efficiencies in discoloration due to the chemical stability and resistance to microbiological attack of the dyes (Bes-Piá et al, 2005;Robinson et al, 2001). Chemical coagulation is a very common treatment but this method generates a sludge which requires an additional treatment to be destroyed (Sala and Gutiérrez-Bouzán, 2012).…”

Section: Introductionmentioning

confidence: 99%

Sustainable dyeing of denim using indigo dye recovered with polyvinylidene difluoride ultrafiltration membranes

Buscio

Crespi

Gutiérrez‐Bouzán

2015

Journal of Cleaner Production

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Indigo is one of the most consumed dyes in the textile sector, as it is widely used for the dyeing of denim clothes. About 15% of indigo used in the dyeing process is discharged to the wastewater treatment plants or sometimes into rivers, in countries where regulations are not strictly applied.In this work, real effluents that contained indigo dye were treated by means of 4 different ultrafiltration membranes. The feasibility to recover the concentrated dye with lab and semi-industrial pilots was also investigated. The studied membranes achieved up to 99% colour removal and 80% chemical oxygen demand (COD) decrease. Finally, the concentrates containing 20 g·L -1 of indigo dye were reused in new dyeing processes. Colour differences (DE cmc ) and rubbing and washing fastnesses were evaluated. Fabrics dyed with the recovered indigo concentrates exhibited similar characteristics than the ones obtained with the commercial dye.

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Section: Introductionmentioning

confidence: 99%

Sustainable dyeing of denim using indigo dye recovered with polyvinylidene difluoride ultrafiltration membranes

Buscio

Crespi

Gutiérrez‐Bouzán

2015

Journal of Cleaner Production

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“…If non-volatile compounds are also present, the problem should be solved with other tools e.g. membrane processes or wet oxidation [13]- [16]. All this is an increasing challenge for engineers to develop new processes which enables factories to fulfil the environmental regulations [17].…”

Section: Introductionmentioning

confidence: 99%

New area for distillation: wastewater treatment

Koczka¹,

Mizsey²

2010

Per. Pol. Chem. Eng.

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The protection of our environment is an actual and global problem in our time and the wastewater treatment is its important part. It is based on biological treatment. In certain cases, however, due to special regulations, the biological tools are not allowed and other options should be considered and selected. The incineration is an alternative but impact assessment studies show that it can make a serious burden upon the environment as well as it might be an expensive solution. Physico-chemical tools can mean a realistic alternative in such cases. In case of wastewater containing organic solvents (ethanol, ethyl-acetate, toluene, halogenated solvents, etc.), that is typical for wastewaters of medicine and fine chemical industries, the distillation is a powerful tool to remove the volatile polluting compounds. These volatile organic compounds (VOC) can contribute significantly to the chemical oxygen demand (COD) of the wastewater. This contribution we call VOC-COD. The Adsorbable Organically Bound Halogens (AOX) can be removed also with distillation. Industrial case studies show that the distillation offers a realistic alternative and the recovered solvents can be also utilised. The COD can be reduced in certain cases below the emission limit (1000 mg/lit) and the AOX, after the physico-chemical treatment, is less than 8 mg/lit.

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“…In general, conventional biological treatment provides good chemical oxygen demand (COD) removal, but low efficiencies in discoloration due to the chemical stability and resistance to microbiological attack of the dyes [4,5]. Chemical coagulation can remove the colour completely, but it generates a sludge which requires an additional treatment to be destroyed [6,7].…”

Section: Introductionmentioning

confidence: 99%

Reuse of textile wastewater after homogenization–decantation treatment coupled to PVDF ultrafiltration membranes

Buscio

Marín²,

Crespi

et al. 2015

Chemical Engineering Journal

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The textile industry is one of the largest consumers of water in the world and its wastewater is a serious problem when it is discharged without the proper treatment. In this work, wastewater generated by textile industry was treated coupling a homogenization-decantation treatment with polyvinylidene difluoride (PVDF) ultrafiltration membranes.Initially, the wastewater was aerated in a homogenization-decantation tank where 17% colour and 10% chemical oxygen demand (COD) were removed. The aerated effluent was treated with an ultrafiltration membrane in order to reuse the permeate in new dyeing processes. Firstly, the ultrafiltration treatment was performed in a laboratory plant. The permeate analysis showed 20% colour removal and 60% COD decrease.On the basis of these results, a semi-industrial system was built. With this plant, the permeate characterization showed similar results. The system was found to be scalable and suitable for the treatment of this kind of effluents.Finally, new dyeings were performed with both permeates. Monochromatic dyeings were carried out with 100% permeate whereas 50% permeate was reused for dyeings with a mixture of three dyes. The colour differences were found to be lower than 1.5, which was the acceptance value established.

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Nanofiltration of textile industry wastewater using a physicochemical process as a pre-treatment

Cited by 58 publications

References 8 publications

Sustainable dyeing of denim using indigo dye recovered with polyvinylidene difluoride ultrafiltration membranes

Sustainable dyeing of denim using indigo dye recovered with polyvinylidene difluoride ultrafiltration membranes

New area for distillation: wastewater treatment

Reuse of textile wastewater after homogenization–decantation treatment coupled to PVDF ultrafiltration membranes

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